My carry gun, a NAA Mini Revolver has a 1 5/8" barrel, and that's not too short. My bedside handgun is my Charter Bulldog with a 3" barrel, and that's just fine. Elsewhere, discreetly placed around the house for my defensive convenience is a S&W 386 Sc/S with a 2 1/2" barrel, a Model 29 and a Webley Mk. VI., both with 6" barrels, and there's a Colt New Service Target with a 7 1/2" barrel right here in my desk. All those barrel lengths are just fine with me, and perfect fits for the particular weapons that wear them.
Your 6" Ruger is perfect. Take comfort and pride in owning a high quality, powerful, accurate, reliable, durable and flexible hand gun. They don't get any better.